- #1
Timiop2008
- 31
- 0
Hi
Can anybody help me with these 3 problems?:
1)
Express (3x-1)/(x+3)^2 in the form A/(x+3) + B/((X+3)^2) where A and B are constants.
2)
A curve C has parametric equations:
x=cost and y=2-cos2t (between 0 and pi)
a)prove this can be expressed as the cartesian equation y=3-2x^2
b) sketch the graph of C
c) what is the t value for the maximum point on the graph
3)
The coefficients of x^2 and x in the expansion of a(1-bx)^-3 are 72 and 18 respectively.
Find a and b, given they are above 0.
I really need help with these 3. Thank You
Can anybody help me with these 3 problems?:
1)
Express (3x-1)/(x+3)^2 in the form A/(x+3) + B/((X+3)^2) where A and B are constants.
2)
A curve C has parametric equations:
x=cost and y=2-cos2t (between 0 and pi)
a)prove this can be expressed as the cartesian equation y=3-2x^2
b) sketch the graph of C
c) what is the t value for the maximum point on the graph
3)
The coefficients of x^2 and x in the expansion of a(1-bx)^-3 are 72 and 18 respectively.
Find a and b, given they are above 0.
I really need help with these 3. Thank You